Fixed a major performance regression on *nix based systems due to incorrect thread handling.Fixed an issue with the add-ons manager not properly handling empty update URLs.Fixed an issue with VP9 video playback on Windows on some systems.Removed some leftover (and unused) telemetry code in the platform and front-end.Updated site-specific user-agent overrides to work around issues with Google fonts, Citi bank (again!) and MeWe.Updated many in-tree third-party libraries to pick up various performance and stability improvements.Building without ICU is no longer supported. Updated Unicode support to Unicode v11, and updated the ICU library accordingly.Updated function.toString handling to align with the updated JavaScript spec.Improved stack size limits on all platforms.Improved the handling of CSS 'sticky' elements in tables.Added support for building with Visual Studio 2022.Added preliminary support for building on Apple Silicon like M1/M2 SoC.Implemented support for async generator methods in JavaScript.This is still disabled by default to investigate potential issues with CloudFlare-backed sites. Implemented 'Origin header CSRF mitigation'.

Implemented Intl.RelativeTimeFormat for web compatibility.Implemented CSS white-space: break-spaces for web compatibility.For example, if you need accessibility features or parental controls, then please visit the Firefox homepage and get the official, non-optimized version of the browser.

Please see the page with technical details to learn exactly what the browser supports, and what it doesn't support. A few carefully selected features have been disabled that are not in high demand, and that do not interfere with the way web pages are displayed or function all to maximize the efficiency of the browser. This browser, even though close to Firefox in the way it works, offers a different set of features than its sibling. Pale Moon offers you a browsing experience in a browser completely built from source with carefully selected features and optimizations to maximize the browser's speed*, stability and user experience, while maintaining compatibility with the thousands of Firefox extensions you have come to love and rely on.

Make sure to get the most out of your browser! Pale Moon is an Open Source, Firefox-based web browser for Microsoft Windows, focusing on efficiency and ease of use.

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